Ratha Chaupoly and Ben Daitz, co-founders of the sandwich chain Num Pang, show you how to make a grilled skirt steak sandwich from their new cookbook, Num Pang: Bold Recipes from New York City’s Favorite Sandwich Shop.

Click here to watch part 2 | The One Recipe You Need to Spice Up Your Office Lunch: http://www.inc.com/ratha-chaupoly-ben-daitz/one-recipe-to-spice-up-your-office-lunch.html